july: one small step
This month, 32 years ago, Neil Armstrong stepped onto the Moon and into the history books. With the words "That's one small step for (a) man, one giant leap for mankind," and watched by one fifth of the world's population, he left the famous footprint in the lunar dust.
Because the only weathering processes on the Moon are extremely slow ones such as micrometeorite impacts and atomic breakdown, the footprint will last many times longer than the whole of recorded history to date.
Image: Neil Armstrong, NASA.